Properties of isoprene
Thermophysical properties for isoprene (CAS: 78-79-5). Use the selector below to view properties in different unit systems.
Calculation Conditions
The following state-dependent properties were calculated at these standard conditions.
Temperature
25 °C
Pressure
1.01325 bar
Need properties at a different state? Use our interactive calculator.
Open CalculatorIdentification
- AtomsC: 5, H: 8
- CAS78-79-5
- FormulaC5H8
- ID78-79-5
- InChIC5H8/c1-4-5(2)3/h4H,1-2H2,3H3
- InChI KeyRRHGJUQNOFWUDK-UHFFFAOYSA-N
- IUPAC Name2-methylbuta-1,3-diene
- Molecular Weight (kg)68.117
- Phasel
- PubChem ID6557
- SMILESCC(=C)C=C
- Synonyms
Physical Properties
- Acentric factor0.164
- Critical pressure (bar)37.4
- Critical temperature (°C)210.15
- Critical volume (m³/kmol)0.266
- Dipole moment0.25
- Melting temperature (°C)-146
- Normal boiling temperature (°C)34
State-dependent Properties
- API gravity66.2705
- Compressibility factor0.00395325
- Density (kg/m³)704.286
- Dynamic viscosity (cP)0.251269
- Enthalpy of vaporization (mass) (kJ)361.992
- Enthalpy of vaporization (molar) (kJ/kmol)2.4658e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient-3.7938e-7
- Kinematic viscosity3.5677e-7
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))133.556
- Molar volume (m³/kmol)0.0967178
- Parachor3.5392e-5
- Poynting correction factor1.00109
- Prandtl number4.2106
- Saturation pressure (bar)0.733798
- Saturation temperature (°C)34.0681
- Solubility parameter1.5143e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.704979
- Specific heat capacity (kJ/kg·K)1.96069
- Surface tension0.0176482
- Thermal conductivity0.117005
- Thermal diffusivity8.4732e-8
Safety Properties
- Autoignition temperature (°C)220
- Flash point temperature (°C)-54
- Lower flammability limit0.015
- Upper flammability limit0.089
Environmental Properties
- Global warming potential
- Ozone depletion potential